Schedule of Revenue by End Market (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total revenue by end market	100.00%	100.00%	100.00%
Advanced Industrial
Segment Reporting Information [Line Items]
Total revenue by end market	50.00%	50.00%	60.00%
Medical
Segment Reporting Information [Line Items]
Total revenue by end market	50.00%	50.00%	40.00%